# Package org.apache.hc.core5.http2.impl.nio

Default implementation of HTTP/2 transport based on the asynchronous (non-blocking) I/O model.

See: Description

- Interface Summary
  Interface | Description
  --- | ---
  H2StreamListener | HTTP/2 stream event listener.

- Class Summary
  Class | Description
  --- | ---
  ClientH2IOEventHandler | `IOEventHandler` that implements client side HTTP/2 messaging protocol with full support for multiplexed message transmission.
  ClientH2PrefaceHandler | I/O event handler for events fired by `ProtocolIOSession` that implements client side of the HTTP/2 protocol negotiation handshake always forcing the choice of HTTP/2.
  ClientH2StreamMultiplexer | I/O event handler for events fired by `ProtocolIOSession` that implements client side HTTP/2 messaging protocol with full support for multiplexed message transmission.
  ClientH2StreamMultiplexerFactory | `ClientH2StreamMultiplexer` factory.
  ClientH2UpgradeHandler | Protocol upgrade handler that upgrades the underlying `ProtocolIOSession` to HTTP/2 in case of a successful protocol negotiation.
  ClientHttp1UpgradeHandler | Protocol upgrade handler that upgrades the underlying `ProtocolIOSession` to HTTP/1.1 in case of a successful protocol negotiation or as a default fall-back.
  ClientHttpProtocolNegotiationStarter | Client I/O event starter that prepares I/O sessions for an initial protocol handshake.
  FrameInputBuffer | Frame input buffer for HTTP/2 non-blocking connections.
  FrameOutputBuffer | Frame output buffer for HTTP/2 non-blocking connections.
  HttpProtocolNegotiator |
  ServerH2IOEventHandler | `IOEventHandler` that implements server side HTTP/2 messaging protocol with full support for multiplexed message transmission.
  ServerH2PrefaceHandler | I/O event handler for events fired by `ProtocolIOSession` that implements server side of the HTTP/2 protocol negotiation handshake.
  ServerH2StreamMultiplexer | I/O event handler for events fired by `ProtocolIOSession` that implements server side HTTP/2 messaging protocol with full support for multiplexed message transmission.
  ServerH2StreamMultiplexerFactory | `ServerH2StreamMultiplexer` factory.
  ServerH2UpgradeHandler | Protocol upgrade handler that upgrades the underlying `ProtocolIOSession` to HTTP/2 in case of a successful protocol negotiation.
  ServerHttp1UpgradeHandler | Protocol upgrade handler that upgrades the underlying `ProtocolIOSession` to HTTP/1.1 in case of a successful protocol negotiation or as a default fall-back.
  ServerHttpProtocolNegotiationStarter | Server I/O event starter that prepares I/O sessions for an initial protocol handshake.

- Exception Summary
  Exception | Description
  --- | ---
  ProtocolNegotiationException | Signals a protocol error in HTTP protocol negotiation.

## Package org.apache.hc.core5.http2.impl.nio Description

Default implementation of HTTP/2 transport based on the asynchronous (non-blocking) I/O model.

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